The Volumetric value in the FX file can only display the effect of 0 or 1.0 in MSFS. For example, Volumetric=0.3 is actually 0, and the displayed value in User lights is also 0.
When moving and walking in control mode, occasional sudden disappearance of lighting effects on the ground, such as flashing lights, may occur when approaching the range of light illumination. But when you exit the control mode and re-enter, you can see that the disappearing navigation light is displayed normally again.
The newly added light spot effect cannot be bound to the display hidden control component for display control. The display or abnormality of the spot effect can only be controlled by adjusting the potentiometer. I am not sure if this is a problem. If not, is it possible to support display hidden control in the future?